/**
 * Licensed to JumpMind Inc under one or more contributor
 * license agreements.  See the NOTICE file distributed
 * with this work for additional information regarding
 * copyright ownership.  JumpMind Inc licenses this file
 * to you under the GNU General Public License, version 3.0 (GPLv3)
 * (the "License"); you may not use this file except in compliance
 * with the License.
 *
 * You should have received a copy of the GNU General Public License,
 * version 3.0 (GPLv3) along with this library; if not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.jumpmind.symmetric.web;

import java.util.Date;
import java.util.List;

import org.apache.log4j.PatternLayout;
import org.jumpmind.symmetric.AbstractSymmetricEngine;
import org.jumpmind.symmetric.ISymmetricEngine;
import org.jumpmind.util.FormatUtils;

public class SymPatternLayout extends PatternLayout {
    
    @Override
    public String getHeader() {
        return buildLogHeader();
    }

    private String buildLogHeader() {
        List<ISymmetricEngine> engines = AbstractSymmetricEngine.findEngines();
        if (engines == null || engines.isEmpty()) {
            return null;
        }
        
        StringBuilder header = new StringBuilder("***** LOG ROLL " + FormatUtils.formatDateTimeISO(new Date()) + " Local nodes:\n");
        for (ISymmetricEngine engine : engines) {
            String msg = "STATUS UNKNOWN";
            if (engine.isStarted()) {
                msg = "RUNNING";
            }
            header.append(engine.getEngineDescription(msg)).append("\n");
        }
        
        return header.toString();
    }

}
